Insulating under a raised house
I am the proud owner of a raised 70 year old, tongue and groove, cyprus home in Louisiana. Winter is coming such as it is. Gas central heat. Worrying about my gas bill that sky rockets in winter. I've had insulation blown in the attic. There is no insulation in the walls except for one of my newly remodeled master bath's exterior wall. Thought about having insulation blown in. TOO expensive. Half of my house has oak flooring over a pine subfloor. The other half is a pine subfloor with nothing over it. Very pretty, but VERY cold in the winter. I have 2x10 joists. I am trying to determine what is the best way to insulate. I've looked at Reflectix and the plastic encased figerglass insulation. R values are very different. I've read some of the postings here. I am uncertain what would be to my advantage, and if I need a vapor barrier. I will be doing the work myself. All my pipes run under the joists, yea. I've been under my house a number of times, and the crawl space is decent, just a little hard and dirty. Plan #1 was to use the Reflectix and staple it to the bottom of the joists. This would create a dead air space. Is this good or bad? Plan #2 is to use the plastic encased fiberglass about 9" thick and staple it to the bottom of the joists coming back with thin plastic stripping for additional support. I did not plan to use a plastic barrier. Also, I plan to use foam insulation around the wires that enter my house through the floor. What do I do with these wires when I insulate? I do have a number of cats who consider their home to be under my house. So, I must take this into consideration, as they like to sit on my pipes. Thanks for any input.